RibE

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  • Description: riboflavin synthase (alpha subunit)

Gene name ribE
Synonyms ribB
Essential no
Product riboflavin synthase (alpha subunit)
Function riboflavin biosynthesis
Metabolic function and regulation of this protein in SubtiPathways:
Riboflavin / FAD
MW, pI 23 kDa, 5.845
Gene length, protein length 645 bp, 215 aa
Immediate neighbours ribA, ribD
Get the DNA and protein sequences
(Barbe et al., 2009)
Genetic context
RibE context.gif
This image was kindly provided by SubtiList







The gene

Basic information

  • Locus tag: BSU23270

Phenotypes of a mutant

Database entries

  • DBTBS entry: [1]
  • SubtiList entry: [2]

Additional information

The protein

Basic information/ Evolution

  • Catalyzed reaction/ biological activity: 2 6,7-dimethyl-8-(1-D-ribityl)lumazine = riboflavin + 4-(1-D-ribitylamino)-5-amino-2,6-dihydroxypyrimidine (according to Swiss-Prot)
  • Protein family:
  • Paralogous protein(s):

Extended information on the protein

  • Kinetic information:
  • Domains:
  • Modification:
  • Cofactor(s):
  • Effectors of protein activity:
  • Interactions: (RibE)3-(RibH)60, the lumazine synthase/riboflavin synthase complex PubMed
  • Localization:

Database entries

  • Structure: 1I8D (from E. coli, 36% identity, 59% similarity) PubMed, , 1RVV (the RibE)3-(RibH)60 lumazine synthase/riboflavin synthase complex) PubMed
  • KEGG entry: [3]

Additional information

Expression and regulation

  • Regulatory mechanism: FMN-box: riboswitch, mediates termination/ antitermination control of the operon, in the absence of FMN: antitermination, in the presence of FMN: termination PubMed
  • Additional information:

Biological materials

  • Mutant: GP203 (erm), available in the Stülke lab
  • Expression vector:
  • lacZ fusion:
  • GFP fusion:
  • two-hybrid system:
  • Antibody:

Labs working on this gene/protein

Your additional remarks

References

J Kenneth Wickiser, Wade C Winkler, Ronald R Breaker, Donald M Crothers
The speed of RNA transcription and metabolite binding kinetics operate an FMN riboswitch.
Mol Cell: 2005, 18(1);49-60
[PubMed:15808508] [WorldCat.org] [DOI] (P p)

Wade C Winkler, Smadar Cohen-Chalamish, Ronald R Breaker
An mRNA structure that controls gene expression by binding FMN.
Proc Natl Acad Sci U S A: 2002, 99(25);15908-13
[PubMed:12456892] [WorldCat.org] [DOI] (P p)

D I Liao, Z Wawrzak, J C Calabrese, P V Viitanen, D B Jordan
Crystal structure of riboflavin synthase.
Structure: 2001, 9(5);399-408
[PubMed:11377200] [WorldCat.org] [DOI] (P p)

K Ritsert, R Huber, D Turk, R Ladenstein, K Schmidt-Bäse, A Bacher
Studies on the lumazine synthase/riboflavin synthase complex of Bacillus subtilis: crystal structure analysis of reconstituted, icosahedral beta-subunit capsids with bound substrate analogue inhibitor at 2.4 A resolution.
J Mol Biol: 1995, 253(1);151-67
[PubMed:7473709] [WorldCat.org] [DOI] (P p)

V N Mironov, A S Kraev, M L Chikindas, B K Chernov, A I Stepanov, K G Skryabin
Functional organization of the riboflavin biosynthesis operon from Bacillus subtilis SHgw.
Mol Gen Genet: 1994, 242(2);201-8
[PubMed:8159171] [WorldCat.org] [DOI] (P p)

V Azevedo, A Sorokin, S D Ehrlich, P Serror
The transcriptional organization of the Bacillus subtilis 168 chromosome region between the spoVAF and serA genetic loci.
Mol Microbiol: 1993, 10(2);397-405
[PubMed:7934830] [WorldCat.org] [DOI] (P p)